I want to setup sales prices for items and I am using inventory management module of jd edwards enterpriseone.

Is there any possibility in which I can use the sales price items functionality.

So after I enter the sales price for each items in specific conditions, is there any possibility for these prices to be automatically shown anytime I enter a inventory issue or any other document which has to do with the issuing of the items.

You can setup Item Sale price through the P4106 application in inventory management. But since your requirement is quite customised, Inventory Issue dont have such functionality to populate Item Sale Price when you are issuing items eventhough you create/change doctype. It will only be populate Item Cost and Extended cost.